The Genus Pachycephala is a group of passerine birds found throughout the Australasian region. Some synonyms for this genus include Thickhead and Whistler, due to their robust and broad-crested heads and their frequent use of whistling calls for communication. Another name used for these birds is Shrike-thrush, as they share some characteristics with both shrikes and thrushes. However, this name can be misleading as these birds are not closely related to either group. The Pachycephala genus encompasses around 20 different species, each with its unique characteristics, including coloration, song, and habitat preferences.